where \(\hat{k}_i=k_i/|{\bf k}|\) , \(i=x,y,z\) . In this case the order parameter of \(A_{1u}\)  state coincides with the order parameter of B-phase of superfluid \(^3\) He [1]}. So, this is interesting to look what kind of properties one can expect in the dirty B-phase. Having this in mind we repeat first the results obtained in the Born approximation [2]}, [1]} and then move on to the general discussion of gapless superconductivity in B-phase at resonance scattering on impurities developed in the paper [4]}.
